I wanted to ask this in this section to get a quicker responce. What injectors would be the best when running a 2000 c5 with a hefty 408. We are looking for 540 RWHP( on motor.) Will my stock fuel pump work, or should that be upgraded as well. The nitrous has a stand alone fuel system, so that part is taken care of..... Any help would be greatly appreciated...

 

At the very least a Racetronix or Lingenfelter intank pump. Then probably 42lb SVO's for a good margin of supply.

 

I agree with above. Get the Racetronix harness as well to supply the new pump with adequate voltage.
I've one in my Z for over a year with no issues (so easy to install, true PnP)

 

Agreed. The fuel pump in the Vette is better than the one in the F-Body, but it's a cheap way to ensure the engine gets adequate fuel, and it's not a difficult install.

Also, some Siemens or SVO 42lbs'ers will work, with the SVO's being closer to a 50lbs fuel injector on our rail.